<?php
/**
 * crcl/base
 *
 * Copyright 2013 CRCL - André Sabosch - info@crcl.de
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

namespace crcl\base\structure;

interface IField
{
  public static function getInstanceFromConfig($aConfig);
}

abstract class Field extends \crcl\base\instance\Factory implements IField
{
  const CONFIG_TYPE = 'type';
  const CONFIG_DEFAULT = 'default';
  const CONFIG_PROCESSORS = 'processors';

  public static function getInstanceFromConfig($aConfig)
  {
    if (!isset($aConfig[self::CONFIG_TYPE]))
    {
      throw new Exception('Missing type.', Exception::ERROR_FIELD_MISSINGTYPE,
        array('config' => $aConfig));
    }
    $sUri = $aConfig[self::CONFIG_TYPE] . '://' . $aConfig[self::CONFIG_TYPE] . '?';
    if (isset($aConfig[self::CONFIG_DEFAULT]))
    {
      $sUri .= self::CONFIG_DEFAULT . '=' . \urlencode($aConfig[self::CONFIG_DEFAULT]);
    }
    if (isset($aConfig[self::CONFIG_PROCESSORS]))
    {
      if (\is_array($aConfig[self::CONFIG_PROCESSORS]))
      {
        $sParam = \implode(',', $aConfig[self::CONFIG_PROCESSORS]);
        $sUri .= self::CONFIG_PROCESSORS . '=' . \urlencode($sParam);
      }
    }

    $sUri = \crcl\base\String::getInstance($sUri)
            ->doNotEndWith('://')
            ->toString();

    return self::getInstance($sUri);
  }

  public static function getInstance($sUri)
  {
    if (\strpos($sUri, '://') === \FALSE)
    {
      $sUri = \crcl\base\String::getInstance($sUri)
              ->doEndWith('://')
              ->toString();
    }

    return parent::getInstance($sUri);
  }

  /** PROTECTED ***********************************************************************************/

  protected static $aFactoryAllowedTypes = array('string', 'integer', 'boolean');
  protected static $sFactoryDirectory = 'field';
}